2 Missing Children, Grandmother Found Dead in Conn.

Two missing children and their grandmother were found dead Tuesday night in a vehicle police were searching for during an Amber Alert in Connecticut.

The Amber Alert was issued for Alton Perry, 2, and Ashton Perry, his 6-month-old brother, of North Stonington, Conn.

The boys' mother told authorities the children had been picked up from day care in Danielson, Conn., Tuesday afternoon by their grandmother, 47-year-old Debra Denison, Tuesday and could not be located, according to a news release from state police.

Police located the vehicle they were looking for -- a white 2001 Chrysler Town & Country minivan, according to the Amber Alert -- at 9:30 p.m. near Lake of Isle near Preston, Conn, Connecticut State Police Lt. Paul Vance told ABC News.